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Need Help with SELECT sub query...

Posted on 2008-06-25
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Last Modified: 2010-04-21
I have a select query:
"Select  company, productid, price  from sales where productid IN (select productid from sales group by productid)  order by productid, price".
However I want retrieve only the top 3 companies per productid with the highest spend (price).

I am looking to achieve this with one query if possible?
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Question by:kirkheaton25
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4 Comments
 
LVL 10

Expert Comment

by:OnALearningCurve
ID: 21867703
Hi kirkheaton25,

Try:

Select  company, productid, price  from sales where productid IN (select TOP 3 productid from sales group by productid ORDER BY SUM(Price) DESC)  order by productid, price

Hope this helps,

Mark.
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LVL 1

Author Comment

by:kirkheaton25
ID: 21868176
Thanks, however this this seems to be returning only the top 3 products). I want the top 3 companies for each productid.

Here's a simple example of the results I'm trying to get. (I hope this makes it clearer.)
Table Sales:
company |  productid  | price
-----------------------------
company1 shampoo 350
company2 shampoo 230
company3 shampoo 120
comany2 biscuits 450
company5 biscuits 230
company1 biscuits 120
company12 cheese 350
company24 cheese 230
company3 cheese 120

(This is for each individual product id is the table sales)
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LVL 60

Accepted Solution

by:
chapmandew earned 500 total points
ID: 21868190
try this (will only work on sql 2005..which you posted)


select * from
(
Select  company, productid, price, ranking = dense_rank() over(partition by productid order by price desc)
from sales
) a
where ranking <= 3
0
 
LVL 1

Author Closing Comment

by:kirkheaton25
ID: 31470650
Brilliant, exactly what I wanted!
(I might even understand what's going on one day!)
Cheers.
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